[CMake] What changes to the cache file, if any, will trigger a rerun of CMake?

[Tyler Roscoe]

On Wed, Sep 23, 2009 at 03:02:31PM +0200, Marcel Loose wrote:
> What changes to the cache file (CMakeCache.txt) will trigger a rerun of
> CMake. AFAIK changes to CMAKE_<LANG>_COMPILER will do this, but are
> there other situations?

Don't all changes to the cache trigger a CMake rebuild?

> My reason for asking this is that I was wondering whether it is possible
> to force a re-run of CMake when one or more OPTION variables are changed
> in the cache *during* a CMake run.

This sounds a little scary but I think I've seen CMake do this when I
edit a CMakeLists in the middle of a build on Linux. Other build systems
might have different ideas about when to check whether the
CMake-generated files are out of date, so this might only work on some
platforms.

tyler